Income and Wealth Inequality

Nicholas Bloom

Raj Chetty

Emmanuel Saez

Leaders: Nicholas Bloom, Raj Chetty, Emmanuel Saez

The CPI is home to some of the country’s most influential analyses of the income and wealth distribution. The purpose of the Income and Wealth RG is to monitor the ongoing takeoff in income inequality, to better understand its sources, and to analyze its implications for labor market performance, educational attainment, mobility, and more. The following is a sampling of the CPI’s research projects within this area.

Trends in income and wealth inequality: What are the key trends in U.S. income and wealth inequality? The U.S. increasingly looks to Emmanuel Saez and his research team for the latest data on U.S. economic inequality.

Distributional National Accounts: In an ambitious infrastructural project, Emmanuel Saez and his team are building a “Distributional National Accounts” based on tax returns, a data set that will eliminate the current gap between (a) national accounts data based on economic aggregates and (b) inequality analysis that uses micro-level tax data to examine the distribution of income but is not consistent with national aggregates. This new data set will in turn make it possible to evaluate the extent to which economic growth, which has long been represented as a preferred poverty-reduction approach, is indeed delivering on that objective.

The rise of between-firm inequality: How much of the rise in earnings inequality can be attributed to increasing between-firm dispersion in the average wages they pay? This question can be addressed by constructing a matched employer-employee data set for the United States using administrative records.

Rent and inequality: It is increasingly fashionable to argue that “rent” accounts for much of the takeoff in income inequality. The Current Population Survey can be used to assess whether this claim is on the mark.

Featured Examples

Click on the active buttons for a full listing of all the important policy analysis, basic research, or journalism addressing this key issue. Also explore our working papers addressing this key issue and our affiliates with expertise in this key issue.

Income And Wealth - CPI Research

Shared Prosperity in America's Communities

While the nation's GDP has doubled in the last thirty years, significant increases in family income have been restricted to a small subset of the American population. This disjunct between national economic growth and stagnating incomes in all but the very top tier of the population corresponds with increasing economic inequality and a lack of social and economic mobility. As a consequence, neighborhoods and metropolitan areas have become more polarized. Stark geographic differences in levels of poverty, income, health outcomes, job opportunities, lifetime earning potential, and educational attainment highlight the degree to which place matters in terms of social and economic opportunity. Shared Prosperity in America's Communities examines this place-based disparity of opportunity and suggests what can be done to ensure that the benefits of economic growth are widely shared. Contributors' essays explore social and economic mobility throughout the country to illuminate the changing geography of inequality, offer a portfolio of strategies to address the challenges of place-based inequality, and show how communities across the nation are implementing change and building a future of shared prosperity.

The Determinants and Welfare Implications of US Workers’ Diverging Location Choices by Skill: 1980-2000

From 1980 to 2000, the rise in the US college/high school graduate wage gap coincided with increased geographic sorting as college graduates concentrated in high wage, high rent cities. This paper estimates a structural spatial equilibrium model to determine causes and welfare consequences of this increased skill sorting. While local labor demand changes fundamentally caused the increased skill sorting, it was further fueled by endogenous increases in amenities within higher skill cities. Changes in cities' wages, rents, and endogenous amenities increased inequality between high school and college graduates by more than suggested by the increase in the college wage gap alone.

Residential Segregation is the Linchpin of Racial Stratification

"White racial attitudes toward black Americans shifted during the Civil Rights Era ... with important consequences for patterns of racial segregation. During the 1980s, principled support for segregation all but disappeared; but despite this retreat from segregationist ideology, whites nonetheless continued to harbor strong anti-black sentiments rooted in negative stereotypes about the low intelligence, lack of motivation, propensity toward criminality, and predatory sexuality of African Americans (Bobo et al. 2012). Even though whites had come to reject segregation in principle, they continued to feel uncomfortable in the presence of many African Americans in practice; and they grew progressively more uncomfortable as black numbers in the social setting rose (Charles 2003)."

The Continuing Increase in Income Segregation, 2007-2012

In this report, we use the most recent data from the American Community Survey to investigate whether income segregation increased from 2007 to 2012. These data indicate that income segregation rose modestly from 2007 to 2012. This continues the trend of rising income segregation that began in the 1980s. We show that the growth in income segregation varies among metropolitan areas, and that segregation increased rapidly in places that experienced large increases in income inequality. This suggests that rising income inequality continues to be a key factor leading to increasing residential segregation by income.

State of the Union - The Poverty and Inequality Report 2016: Education

The United States is an outlier on many measures of inequality. When compared to other well-off countries, it has unusually high levels of income inequality, unusually high levels of wealth inequality, and unusually high levels of poverty. The purpose of this article is, in part, to ask whether the “income achievement gap”—the test score gap between children from high- and lowincome families—is also unusually high in the U.S. This gap is important because it reflects (a) the extent to which students experience different socioeconomic conditions in their early childhood and different schooling conditions once they reach school age, and (b) the extent to which these socioeconomic and schooling context differences lead to different educational outcomes (test scores, in this case). It may accordingly be understood as an early (albeit obviously imperfect) measure of the extent to which opportunities are unequal. Although a main purpose of this article is simply to establish how the U.S. stacks up against its peer countries on this key measure of unequal opportunity, our follow-up objective is to cast some light on the sources of international differences in this measure. We examine, in particular, whether income inequality is an important source of the achievement gap. The evidence from the U.S. is at least suggestive of an “income inequality” effect: In the 1980s and 1990s, as income inequality in the U.S. grew sharply, so too did the academic achievement gap by family income. That family income and family socioeconomic status (SES) are related to children’s academic achievement is not surprising; that this relationship grew so rapidly in the U.S. in the last several decades, however, is rather surprising. The U.S. trends suggest that some of this growth may have been the result of rising income inequality.

Social Mobility in a High-Inequality Regime

Are opportunities to get ahead growing more unequal? Using data from the General Social Survey (GSS), it is possible to provide evidence on this question, evidence that is suggestive but must be carefully interpreted because the samples are relatively small. The GSS data reveal an increase in class reproduction among young and middle-age adults that is driven by the growing advantage of the professional-managerial class relative to all other classes. This trend is largely consistent with our new “top-income hypothesis” that posits that rising income inequality registers its effects on social mobility almost exclusively in the divide between the professional-managerial class and all other classes. We develop a two-factor model in which the foregoing effects of the inequality takeoff are set against the countervailing effects of the expansion of mass education. As the model implies, the trend in intergenerational association takes on a convex shape in the younger age groups, with the change appearing to accelerate in the most recent decade. These results suggest that the takeoff in income inequality may account in part for the decline in mobility.

Compounded Deprivation in the Transition to Adulthood: The Intersection of Racial and Economic Inequality Among Chicagoans, 1995–2013

This paper investigates acute, compounded, and persistent deprivation in a representative sample of Chicago adolescents transitioning to young adulthood. Our investigation, based on four waves of longitudinal data from 1995 to 2013, is motivated by three goals. First, we document the prevalence of individual and neighborhood poverty over time, especially among whites, blacks, and Latinos. Second, we explore compounded deprivation, describing the extent to which study participants are simultaneously exposed to individual and contextual forms of deprivation—including material deprivation (such as poverty) and social-organizational deprivation (for example, low collective efficacy)—for multiple phases of the life course from adolescence up to age thirty-two. Third, we isolate the characteristics that predict transitions out of compounded and persistent poverty. The results provide new evidence on the crosscutting adversities that were exacerbated by the Great Recession and on the deep connection of race to persistent and compounded deprivation in the transition to adulthood.

Has Consumption Inequality Mirrored Income Inequality?

We revisit to what extent the increase in income inequality since 1980 was mirrored by consumption inequality. We do so by constructing an alternative measure of consumption expenditure using a demand system to correct for systematic measurement error in the Consumer Expenditure Survey. Our estimation exploits the relative expenditure of high- and low-income households on luxuries versus necessities. This double differencing corrects for measurement error that can vary over time by good and income. We find consumption inequality tracked income inequality much more closely than estimated by direct responses on expenditures.

Improving the Measurement of Consumer Expenditures

Robust and reliable measures of consumer expenditures are essential for analyzing aggregate economic activity and for measuring differences in household circumstances. Many countries, including the United States, are embarking on ambitious projects to redesign surveys of consumer expenditures, with the goal of better capturing economic heterogeneity. This is an appropriate time to examine the way consumer expenditures are currently measured, and the challenges and opportunities that alternative approaches might present.

Improving the Measurement of Consumer Expenditures begins with a comprehensive review of current methodologies for collecting consumer expenditure data. Subsequent chapters highlight the range of different objectives that expenditure surveys may satisfy, compare the data available from consumer expenditure surveys with that available from other sources, and describe how the United States’s current survey practices compare with those in other nations.

Recent research suggests that participation in organized extracurricular activities by children and adolescents can have educational and occupational payoffs. This research also establishes that participation is strongly associated with social class. However, debate has ensued—primarily among qualitative researchers—over whether the association between class and activities stems exclusively from inequalities in objective resources and constraints or whether differing cultural orientations have a role. We address this debate using a nationally representative sample of children's time diaries, merged with extensive information on their families, to model participation in, and expenditures on, organized activities. While we cannot directly observe cultural orientations, we account for a substantially wider array of resources and constraints than previous studies. We find that, above and beyond these factors, maternal education has a consistently large effect on the outcomes we study. We discuss the plausibility of a cultural interpretation of this result, as well as alternative interpretations.